Sleep Disorder Linked to Brain Disease

Thrashing about while you’re asleep may be a sign of something more troubling than mere restlessness: It could be a predictor of brain disease. A new study suggests that 80 to 90 percent of people who suffer from rapid eye movement (REM) sleep behavior disorder will eventually develop Parkinson’s or another brain disease. What’s REM sleep behavior disorder? It’s a condition that causes people to act out vivid, intense, even violent dreams. People who have it often yell, punch and kick …